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Stats 1 week 2 important questions

Week 2 of Statistics for Data Science I: Describing categorical data. Extra important questions based on the recent, changing patterns of the exams, from basic to advanced. Practise them in learning mode: each question has a worked solution.

Question 1

Numerical answer

The mode of payment used of 100 people was recorded:

CategoryFrequencyCash26Card27UPI8Wallet39\begin{array}{|l|c|}\hline \text{Category} & \text{Frequency}\\ \hline \text{Cash} & 26 \\ \text{Card} & 27 \\ \text{UPI} & 8 \\ \text{Wallet} & 39 \\ \hline \end{array}

What is the relative frequency of "Card"? (Give the answer as a decimal, correct to 2 decimal places.)

Question 2

One correct option

The mode of payment used of 20 people was recorded:

CategoryFrequencyCash2Card9UPI6Wallet3\begin{array}{|l|c|}\hline \text{Category} & \text{Frequency}\\ \hline \text{Cash} & 2 \\ \text{Card} & 9 \\ \text{UPI} & 6 \\ \text{Wallet} & 3 \\ \hline \end{array}

What percentage of the people chose "Card"?

  1. A

    4444

  2. B

    4646

  3. C

    9090

  4. D

    4545

Question 3

One correct option

The mobile phone brand owned of 50 people was recorded:

CategoryFrequencySamsung13Apple8Redmi5Vivo8Oppo16\begin{array}{|l|c|}\hline \text{Category} & \text{Frequency}\\ \hline \text{Samsung} & 13 \\ \text{Apple} & 8 \\ \text{Redmi} & 5 \\ \text{Vivo} & 8 \\ \text{Oppo} & 16 \\ \hline \end{array}

Which category is the mode?

  1. A

    Apple

  2. B

    Oppo

  3. C

    Samsung

  4. D

    Redmi

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